Switch Mode Power Supply Section - LG 50PV450 Manual

SWITCH MODE POWER SUPPLY SECTION

SWITCH MODE POWER SUPPLY SECTION
This Section of the Presentation covers troubleshooting the Switch Mode Power Supply. Thi S ti f th P
Upon completion of the section the technician will have a better understanding of
the operation of the Power Supply Circuit and will be able to locate test points needed for
troubleshooting and alignments.
• DC Voltages developed on the SMPS
• Adjustments VA and VS.
Always refer to the Voltage Sticker on the back of the panel, located at the upper Center,
for the correct voltage levels for the VA and VS supplies as these voltages will vary from
Panel to Panel even on the same Model.
SMPS P/N EAY62171101
Check the silk screen label on the top center of the Power Supply board to identify the correct part Ch k th ilk
number. (It may vary in your specific model number).
On the following pages, we will examine the Operation of this Power Supply.
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